Tube Bank with Integral Wake Splitter Performance at Reynolds Number 5000 to 50000

Abstract:

Present study involves experimental and numerical work to investigate the effect of integral wake splitter towards the overall performance of cross-flow, circular tube, heat exchanger system. The experimental work was conducted to obtain local distribution of pressure coefficient around plain tube bank of staggered arrangement which was subjected to a cross-flow of air with Reynolds number of 15950. The numerical work consisted of 2-dimensional unsteady numerical simulation which was validated against the experimental data. The validated numerical approach was utilized to simulate cross-flow around similar tube bank but with integral wake splitter of length-to-diameter ratio of 0.5, 1, 1.5 and 2, at Reynolds number between 5000 to 50000. It is concluded that integral wake splitter is able to reduce pressure loss, which in turn reduces power requirement of a blower, which is intended in effort to increase the system efficiency. Splitter which acts as fin may improve the overall performance of the system by enhancing total heat removal via extended surface provided that certain value of fin efficiency is achieved.

• Periodical: Applied Mechanics and Materials (Volumes 465-466)
• Pages: 546-551
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.465-466.546
• Online since: December 2013
• Authors: Suzairin Md Seri, Zainal Ambri Abdul Karim, Mohd Faizal Mohideen Batcha, Vijay R. Raghavan
• Keywords: Cross-Flow, Integral Wake Splitter, Performance, Tube Bank

References

[1] Y. H. Zhang, X. Wu, L. B. Wang, K. W. Song, Y. X. Dong and S. Liu, Comparison of heat transfer performance of tube bank fin with mounted vortex generators to tube bank fin with punched vortex generators, Experimental Thermal and Fluid Science 33 (2008).

DOI: 10.1016/j.expthermflusci.2008.07.002

[2] S. Tiwari, D. Chakraborty, G. Biswas and P. K. Panigrahi, Numerical prediction of flow and heat transfer in a channel in the presence of a built-in circular tube with and without an integral wake splitter, International Journal of Heat and Mass Transfer 48 (2005).

DOI: 10.1016/j.ijheatmasstransfer.2004.09.003

[3] V. Kongkaitpaiboon, K. Nanan and S. Eiamsa-ard, Experimental investigation of convective heat transfer and pressure loss in a round tube fitted with circular-ring turbulators, International Communications in Heat and Mass Transfer 37 (2010).

DOI: 10.1016/j.icheatmasstransfer.2009.12.016

[4] Y. Yajima, and O. Sano, A note on the drag reduction for a circular cylinder due to double rows of holes, Fluid Dyn. Res. 18 (1996) 237–243.

DOI: 10.1016/0169-5983(96)00015-9

[5] G. G. A. Valera, N. E. Castellano and E. E. Avila, Effect of internal flux on the heat transfer coefficient in circular cylinders in cross flow, International Journal of Heat and Mass Transfer 50 (2007) 4098-4104.

DOI: 10.1016/j.ijheatmasstransfer.2006.08.041

[6] M. G. Khan, A. Fartaj and D. S. K. Ting, An experimental characterization of cross-flow cooling of air via an in-line elliptical tube array, International Journal of Heat and Fluid Flow 25 (2004) 636-648.

DOI: 10.1016/j.ijheatfluidflow.2004.01.002

[7] R. S. Matos, J. V. C. Vargas, T. A. Laursen and A. Bejan, Optimally staggered finned circular and elliptic tubes in forced convection, International journal of Heat and Mass Transfer 47 (2004) 1347-1359.

DOI: 10.1016/j.ijheatmasstransfer.2003.08.015

[8] B. M. Jacimovic, S. B. Genic and B. R. Latinovic, Research on the air pressure drop in plate finned tube heat exchangers, International Journal of Refrigeration 29 (2006) 1138-1143.

DOI: 10.1016/j.ijrefrig.2006.02.003

[9] C. Liang and G. Papadakis, Large eddy simulation of cross-flow through a staggered tube bundle at subcritical Reynolds number, Journal of Fluids and Structures 23 (2007) 1215-1230.

DOI: 10.1016/j.jfluidstructs.2007.05.004

[10] S. Balabani, An experimental investigation of the crossflow over tube bundles, Ph.D. Thesis, King's College London, University of London, (1996).

[11] M. M. Alam, H. Sakamoto and Y. Zhou, Determination of flow configurations and fluid forces acting on two staggered circular cylinders of equal diameter in cross-flow, Journal of Fluid and Structures 21 (2005) 363-394.

DOI: 10.1016/j.jfluidstructs.2005.07.009

[12] E.A. Anderson and A.A. Szewczyk, Effects of a splitter plate on the near wake of a circular cylinder in 2 and 3 dimensional flow configurations, Experiments in Fluids, 23, (1997) 161-174.

DOI: 10.1007/s003480050098

[13] E. Shirani and H. Nasibi , Numerical Simulation of Low Reynolds Number Flows in In-Line Tube Banks. Journal of Applied Sciences, 1 (2001) 275-282.

DOI: 10.3923/jas.2001.275.282

[14] F. Khoddamrezaee, R. Motallebzadeh and D. Jajali Vahid, Simulation of (EG+Al2O3) Nanofluid Through the Shell and Tube Heat Exchanger with Rectangular Arrangement of Tubes and Constant Heat Flux. Journal of Applied Sciences, 10 (2010) 500-505.

DOI: 10.3923/jas.2010.500.505

[15] S. Balabani, and M. Yianneskis, An experimental study of the mean flow and turbulence structure of cross-flow over tube bundles, Proceedings of IMechE Part C, Journal of Mechanical Engineering Science 210 (1996) 317–331.

DOI: 10.1243/pime_proc_1996_210_204_02

[16] Y. Yajima and O. Sano, A note on the drag reduction for a circular cylinder due to double rows of holes, Fluid Dyn. Res. 18 (1996) 237–243.

DOI: 10.1016/0169-5983(96)00015-9

[17] A. Zukauskas and J. Ziugzda, Heat Transfer of a Circular Cylinder in Crossflow, Hemisphere Publishing Corporation, Washington D.C., (1985).

[18] J. W. Scholten and D. B. Murray, Heat transfer and velocity fluctuations in a staggered tube array, International Journal of Heat and Fluid Flow 19 (1998) 233-244.

DOI: 10.1016/s0142-727x(98)00007-1